Greyhounds are the only breed of dog mentioned by name in the Bible (King James version, proverbs, 30:29-31). They've also been in the writings of Shakespeare (Henry V) and Chaucer (Canterbury tales).
General Custer owned 22 greyhounds that he used for hunting. He loved taking a nap on the floor of his billiard room surrounded by "a sea of greyhounds."
Greyhounds were brought to the United States to help control the jackrabbit population in the west because they were the only breed fast enough to catch the rabbits.